Answer:
True
Explanation:
B cells are involved in the humoral immune response and T cells are involved in the cell-mediated immune response. Class 1 MHC molecules are found on all uncleared cells and class 2 MHC molecules are found on macrophages, B cells, and activated T cells.
Why water is a wonder liquid? Justify ( A major resource to determine life on the earth.)
please please guys give me answer of this Question
Answer:
Following are the reasons:Water is a major solvent in nature.Water is a major solvent in nature.Water allows materials to sit upon it for pollen, dust, water insects, and other materials.Water is a major solvent in nature.Water allows materials to sit upon it for pollen, dust, water insects, and other materials.Wate is essential for daily activities and drinking.Water is a major solvent in nature.Water allows materials to sit upon it for pollen, dust, water insects, and other materials.Wate is essential for daily activities and drinking.Most of the chemical reaction is only possible due to water.Water is a major solvent in nature.Water allows materials to sit upon it for pollen, dust, water insects, and other materials.Wate is essential for daily activities and drinking.Most of the chemical reaction is only possible due to water.Living organism animals, plants, microorganisms, human beings mainly contain water that makes life possible on the earth.Water is a major solvent in nature.Water allows materials to sit upon it for pollen, dust, water insects, and other materials.Wate is essential for daily activities and drinking.Most of the chemical reaction is only possible due to water.Living organism animals, plants, microorganisms, human beings mainly contain water that makes life possible on the earth.Environment temperature, rainfall etc are maintained by water.Water is a major solvent in nature.Water allows materials to sit upon it for pollen, dust, water insects, and other materials.Wate is essential for daily activities and drinking.Most of the chemical reaction is only possible due to water.Living organism animals, plants, microorganisms, human beings mainly contain water that makes life possible on the earth.Environment temperature, rainfall etc are maintained by water.There are much more other properties which make water as a wonderful liquid.2. Students survey the area in and around a small
pond and find the following: algae, rocks,
tadpoles, snails, mud, water. Which items
represent biotic factors? Select all that apply.
algae
® rocks
© tadpoles
O snails
E mud
f water
Answer:
Algae, tadpoles, snails
Explanation:
The image below depicts the larval stages of various mosquitoes. The three have very similar structures. What does this suggest about these organisms ?
Answer: You picked the correct answer, "They all inherited their traits from a common ancestor."
Explanation: Well, one I had a test on this question too and I got it right. Second, if all species shown have something in common (structures) than they most likely got it from a common ancestor.
They all inherit their traits from a common ancestor. So, the correct option is C.
What is an Ancestor?An ancestor is a parent or the parent of an antecedent, commonly referred to as a forefather, fore-elder, or forebear. Each individual from whom one is born is an ancestor. The individual who has received an estate, according to law.
Anybody we are descended from is an ancestor. To descend in a family implies to "come from." The parents, who in turn descended through their parents, who in turn descended from the parents, and so forth. The ancestors are the line of parents and kids.
Your ancestors are your mother, father, and grandparents. If matrilineal descent is practiced in the culture or civilization, your mother and grandmother are the ancestors but not your dad or grandfather. They all derive their characteristics from an in this instance.
Therefore, the correct option is C.
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Give two examples of phospholipid soluble molecules? How can these molecules move across the cell membrane? What affects the direction of their movement
Answer:
1. Only small uncharged molecules can diffuse freely through phospholipid bilayers (Figure 2.49). Small nonpolar molecules, such as O2 and CO2, are soluble in the lipid bilayer and therefore can readily cross cell membranes. 2. Diffusion through a permeable membrane moves a substance from an area of high concentration (extracellular fluid, in this case) down its concentration gradient (into the cytoplasm). 3. Objects change their motion because unbalanced forces act on them. There are four main factors that affect the motion of objects. These factors are force, friction, inertia, and momentum.
Explanation:
Hope this helps. ^_^
Answer:
Examples include steroids and Vitamins
Phospholipids ,as the name implies fall under the category of lipids. Phospholipids have a hydrophilic "head" which has a strong attraction to water molecules.The hydrophilic head contains a phosphate group which allows for reactivity with water molecules.
Phospholipids also contains two hydrophobic "tails" which has a strong repulsion to water. The tails are derived from fatty acids and are joined by a glycerol molecule. These compounds are less reactive to water molecules .
These properties make phospholipids to be soluble in both water and oil which favors the movement of molecules such as Steroids and Vitamins in and out of the cells through the process called Diffusion.
The direction of movement depends on the concentration of molecules as they usually move from a region of high concentration to a region of lower concentration to ensure there is equilibrium and proper functioning of cells.
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Stanimar is staying in the hospital after surgery. He starts to suffer from a fever, diarrhea, and abdominal pain. How did Stanimar most likely contract his nosocomial infection?
A urinary catheter was not properly sterilized before it was used.
O A nurse did not properly disinfect her hands before she inserted the ventilator during surgery.
O A health-care worker did not disinfect her hands after she helped another patient to the bathroom.
O The surgical instruments that were used during his surgery were not properly cleaned before his procedure.
Answer: I believe the answer to be a.
Explanation: The symptoms listed are cause of a urinary tract infection, so the most likely answer would have to do with the one having to do with the urinary tract and can often cause a very hideous infection.
Stanimar most likely contract his nosocomial infection through the fact that involves the mechanism of a urinary catheter was not properly sterilized before it was used. Thus, the correct option is A.
What is Nosocomial infection?Nosocomial infection may be defined as a form of healthcare-associated infection that is acquired during the process of receiving health care that was not present during the time of admission.
Some common types of Nosocomial infection include urinary tract infections, respiratory pneumonia, surgical site wound infections, bacteremia, and gastrointestinal and skin infections.
The nosocomial infection generally spread through the pathogens like Staphylococcus aureus, Pseudomonas aeruginosa, and E. coli.
As Stnimar is suffering from a fever, diarrhea, and abdominal pain, he definitely has a urinary tract infection. It may arise due to the contamination of a urinary catheter that was not properly sterilized before it was used.
Therefore, the correct option for this question is A.
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What order of reptiles do snakes belong to?
Answer: Scaled reptiles
Explanation:
Answer:
They belong to "Scaled reptiles" hope this helps!
I’ll mark as BRANLIEST!!
30 POINTS!!
Please help me!!
Answer:
They are complimentary DNA strands of each other
I remember them via AT (AT-AT from Star Wars and this gets you 2 H bonds) and CG (cross guard light saber, the ridiculous one with the helm of the sword having it's own light saber so it is crossed and has 3 H bonds). Ridiculous makes things more memorable imo.
Explanation:
What would happen if we did not add leap years
adenine+ribose sugar+3phosphates=
What is the relationship between DNA, codons, and proteins?
5. Speed is a __________ but has no direction whereas, velocity is a ______________ which includes direction. A vector has ____________ and _______________.
Speed is a scalar quantity but has no direction whereas, velocity is a magnitude which includes direction. A vector has magnitude and direction.
Answer:
. Speed is a ____scalar quantity______ but has no direction whereas, velocity is a ______vector quantity________ which includes direction. A vector has __magnitude__ and __direction___.
how can you walk under water?
Answer:
by taking oxygen heavy bottle for respiration and to touch a ground.
How do plants in the ocean deal with the limited penetration of light into the water?
Group of answer choices
Loose root systems
Tall structures with broad leaves
Mutualism with fish
Reliance on tidal rises and falls
Answer:
3
Explanation:
Which of the following statements about phenotypes and genotypes is false?
A. Phenotype can be changed by the environment.
B. Genotype affects phenotype by providing the instructions for making proteins.
C. Phenotype is an organism's visible characteristics.
D. An organism's phenotype is only made up of genes and alleles.
Answer:
D. An organism's phenotype is only made up of genes and alleles.
An organism's phenotype is only made up of genes and alleles is the false statement about genotype and phenotype.Therefore, the correct option is D.
What is a genotype and phenotype?Genotype refers to the genetic makeup of an organism, including all of its inherited genes and variations. Phenotype refers to the physical characteristics and traits of an organism that result from both its genetic makeup (genotype) and environmental factors.
The given statement is false because an organism's phenotype is not only determined by its genes and alleles, but also by environmental factors such as diet, exposure to sunlight, and other external factors.Therefore, the correct option is D.
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5
Which two of the following are allotropes of carbon?
w
Buckminsterfullerene
Graphene
Footballene
Steel
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Which of the following are allotropes of carbon?
a) Buckminster Fullerene
b) Graphene
c) Footballene
d) Steel
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The right answer is option a (Buckminster fullerene).
Fullerene is one of the crystalline allotrope of carbon, which was discovered in 1985 collectively by the scientists Richard E. Smalley, Robert F. Curl, Sean O' Brien, James Heath and Harold Kroto. The name 'buckminsterfullerene' was given to the fullerene molecule discovered as a homage to the American architect and scientist Buckminster Fuller.
________________________________
MORE TO KNOW ABOUT FULLERENE:-Properties of fullerenes:
It is found in soot, interstellar dust and in carbon rich rocks.They are bad conductors of electricity.They are magnetic in nature.They are odourless.They can be soluble in solvents like chloroform, benzene or toluene.Uses of fullerenes:
They are used as lubricants.They are used as insulators.Some forms of fullerenes can conduct heat and electricity. So, they are used as superconductors and semiconductors.They are used in the process of drug delivery._________________________________
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Multiple Choice
Which of the following is typical of aerobic respiration?
decreases a plant’s weight
contains two stages, glycolysis and fermentation
produces methane as a byproduct
produces little energy
Answer:
decreases a plant’s weight
Explanation:
Aerobic respiration is a process of respiration in which oxygen is required and the byproducts of aerobic respiration are carbon dioxide, water and energy.
Plants undergo aerobic respiration and it is a catabolic process in which complex compounds in plants turns into simpler compounds. This process reduces the dry weight of the plants.
Glycolysis is the first step in both aerobic and anaerobic respiration so it is not a typical aerobic respiration.
Hence, the correct answer is "decreases a plant’s weight".
Which of the following environmental factors would positively influence the survival and reproduction of only light peppered moths?
A.
A forest fire that burns down the trees.
B.
Laws that improve air quality and restrict pollution.
C.
Increasing the number of factories that burn coal into the air.
D.
A disease that infects the light peppered moths and not the dark.
Answer:
The correct answer is - option B. laws that improve air quality and restrict pollution.
Explanation:
The dark peppered moths were the adaption of the light peppered moths due to the change in the environmental condition of increased pollution that made tree bark dark in color and allows birds to easily prey on the light peppered moths.
This leads to natural selection and light moths become dark but the after Clean Air Act was that there was less pollution then there is less soot in the air, so trees were less black which result in the Light-colored moths would increase, and dark-colored moths would decrease.
How can research into cell division and aging help humans live longer and healthier?
Answer:
cell division means when the cell will grow old and die if you are able to slow down the cell division process or control it then the aging process can be slowed.
Answer:
because it can help you know what to prevent or to keep doing
Explanation:
What three traits are used to classify organisms?
A
Cell type, how they create energy, number of cells they have
B
Cell type, if they're living or dead, the number of organs they have
с
How they create energy, how many years they live, how big they are
D
The number of cells they have, the number of years they live, the number of
offspring they produce
Answer:
I think it’s D
Explanation:
When a person doesn't get enough sleep, their immune system:
A Becomes stronger
B Becomes weaker
C Gains autoimmunity
D Can't remember diseases
Answer:
becomes weaker
Explanation:
because if you stay up all night you might sick
Explanation:
When a person doesn't get a enough sleep, their immune system can become weaker.
I hope this helps you.
According to the kinetic theory of matter, how many particles that make up a substance are constantly in motion?
Answer:
D
Explanation:
According to the kinetic theory of matter, option D. all the particles that make up a substance are constantly in motion.
The Kinetic Theory of Matter states that all matter is made of particles that are atoms and molecules that are constantly in motion in the substance, therefore, particles of all matter have kinetic energy.
Some particles have more kinetic energy than other particles due to fact that all particles of matter do not move at the same speed even though particles of matter are constantly moving.The temperature of matter or object is the average kinetic energy of the particles in an object.Thus, the correct answer is - option D. all the particles.
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The answer please answer will give brainliest
Answer:
Atmosphere
Explanation:
can i get the brainliest
♡︎10 points for this question♡︎
Describe an area that would have the most and least bacteria.
Would be very appreciated if you help me out! (Will also be marked as brainliest)
♡´･ᴗ･`♡
i need help plz !!!!
Answer:
Black
Orange
Black and white, orange and white.
Explanation:
All of these options are possible for colors in males except black, orange, and white. This phenotype requires 2X chromosomes, one with the black allele and one with the orange allele.
what produces the cell cycle?
Answer:
The cell cycle can be thought of as the life cycle of a cell. In other words, it is the series of growth and development steps a cell undergoes between its “birth”—formation by the division of a mother cell—and reproduction—division to make two new daughter cells.
Explain how photosynthesis provides energy for consumers.
Answer:
Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules. The energy used to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as cellular respiration.
Which statement best describes the Law of Superposition?
Answer:
B) In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
Explanation:
CORRECT
The best statement for law of Superposition is in undisturbed layers of sedimentary rock, the lowest layers contain the older rocks. Thus option B is correct.
What is law of superposition?Law of superposition stated that a key stratigraphic concept indicating that within a sequence of sedimentary rock layers, the oldest layer is at the bottom and the layers are increasingly younger with ascending order in the sequence.
Superposition is defined as the ability of a quantum system to exist in numerous states until it is measured.
It can also be stated that an assumption that serves as a foundation for the sciences of geology, archaeology, and other fields concerned with geological stratigraphy.
Thus, the best statement for law of Superposition is in undisturbed layers of sedimentary rock, the lowest layers contain the older rocks. Thus option B is correct.
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Your question is incomplete, but probably your complete question was
Which statement best describes the Law of Superposition?
A) Each sedimentary rock layer represents 1000 years of Earth's age, much like the rings of a tree
B) In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
C) Rocks that form near volcanos are older than surrounding rock
Which two characteristics describe organisms in the kingdom Animalia?
A. They are heterotrophic
B.They are unicellular
C. They are multicellular
D.They have prokaryotic cells
This is a multi (two) answer
Answer:A and C
Explanation:
Answer:
A and C
Explanation:
All members of Animalia are multicellular, and all are heterotrophs (that is, they rely directly or indirectly on other organisms for their nourishment). Most ingest food and digest it in an internal cavity. Animal cells lack the rigid cell walls that characterize plant cells.
I also did the test and got it right.
Which scenario would most likely result in the extinction of one or more species? The water temperature of a pond decreases slightly, and the members of the pond populations adapt to the change. The conditions are abnormally dry for one season in a desert, resulting in the deaths of a few members of a snake population. A predatory fish is introduced into a lake, resulting in a dramatic decrease in the populations of smaller fish. A new plant species begins growing in a forest, resulting in a new food resource for many animal populations.
ITS C
Answer:
C. A predatory fish is introduced into a lake, resulting in a dramatic decrease in the populations of smaller fish.
Explanation:
i took a test and i'm pretty sure its right
what is this new island made from? sedimentary, metamorphic, or igneous?
Answer:metamorphic
Explanation: